2010 Hummer H3T Owner's Manual - Page 278

10-12 Vehicle Care What to Do with Used Oil Used engine oil contains certain elements that can be unhealthy for your skin and could even cause cancer. Do not let used oil stay on your skin for very long. Clean your skin and nails with soap and water, or a good hand cleaner. Wash or properly dispose of clothing or rags containing used engine oil. See the manufacturer's warnings about the use and disposal of oil products. Used oil can be a threat to the environment. If you change your own oil, be sure to drain all the oil from the filter before disposal. Never dispose of oil by putting it in the trash, pouring it on the ground, into sewers, or into streams or bodies of water. Recycle it by taking it to a place that collects used oil. After changing the engine oil, reset the system: 1. Turn the ignition key to ON/RUN with the engine off. 2. Press and release the stem in the lower center of the instrument cluster until the OIL LIFE message is displayed. 3. Once the alternating "Oil Life" and "Reset" messages appear, press and hold the stem until several beeps sound. This confirms that the oil life system has been reset. 4. Turn the key to LOCK/OFF. If the "Change Oil" message comes on again and stays on for 30 seconds at the next ignition cycle, it did not reset. The system needs to be reset again. Automatic Transmission Fluid When to Check and Change Automatic Transmission Fluid A good time to check the automatic transmission fluid level is when the engine oil is changed. Change the fluid and filter at the intervals listed in Scheduled Maintenance on page 11‑2, and be sure to use the transmission fluid listed in Recommended Fluids and Lubricants on page 11‑8. How to Check Automatic Transmission Fluid Because this operation can be a little difficult, you may choose to have this done at the dealer service department. If adding it yourself, be sure to follow all the instructions here, or there could be a false reading on the dipstick.